Tumbler Locks INTRODUCTION MARKET POTENTIAL

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1 20 Tumbler Locks PRODUCT CODE : QUALITY AND STANDARDS : IS 4230:1967 PRODUCTION CAPACITY : Qty. : 1.20 Lakh Nos. (per annum) Value : Rs Lakhs MONTH AND YEAR : April, 2003 OF PREPARATION PREPARED BY : Small Industries Service Institute 10 - Industrial Estate, Pologround, Indore (M.P.) Ph.Nos. : /421540/ Tele Fax : sisiind@sancharnet.in INTRODUCTION As is revealed from the name itself, Tumbler Locks are used for locking of doors, shutters of houses/shops. Tumbler locks are a kind of pad locks. The body of the tumbler lock is pressure die casted from Aluminium or Zinc alloy. The tumbler locks are available in different shapes and sizes, among them the most common are 20, 25, 30, 35 and 46 mm. These locks are opened with the help of a key made from either brass, mild steel or die casted non ferrous metal, To operate the lock, the key is inserted in the key hole provided at the bottom of the lock, opposite side to shackle. These locks are used to lock windows, Almirah, trunks etc. The alloy used to manufacture such locks is known as Mazak Alloy. Mazak alloy is an alloy having Zinc as the base material. The composition of other elements in Mazak alloy used for this purpose is as follows: Aluminium : 4% Copper : 2.7% Magnesium : 0.1 to 0.3% The alloy having the above composition is hard and strong and can be easily diecasted. Pressure die-casting has been widely used to produce sound and strong castings of accurate dimensions as they need no final machining to size. The surface is smooth and good. MARKET POTENTIAL Since Lock is an essential household item, its demand is ever increasing.

2 TUMBLER LOCKS 103 Tumbler lock being a stout lock is considered to be a good quality lock. BASIS AND PRESUMPTIONS It is considered that the unit is run 300 days in a year with 8 hours per day. The rates for raw material, labour, machinery etc. have been taken as prevailing at the time of preparation of project scheme. Margin money requirement, terms of loan, interest rates may vary from time to time and institution to institution providing finance, which may be verified. In this project profile, the rate of interest has been considered as 16% per annum. IMPLEMENTATION SCHEDULE It is estimated that it may take 4-5 months from conception to commercial production including preparation of project report, finalization of loan from financial institutions, procurement of machinery, erection and commissioning, recruitment of staff and labour, registration and clearance from authorities. TECHNICAL ASPECTS Process of Manufacture Tumbler lock consists of the following main components: (a) body (b) cylinder (c) levers and its mechanisms (d) shackle and (e) Tumbler key. (a) Body: Housing of lock mechanism, which contains all the parts except key and shackle is known as body of the tumbler lock. However, one end of the shackle is also fitted in the body. The body of the lock is pressure die casted from Aluminium or Zinc alloy called Mazak Alloy. After pressure die casting, the burrs and sharp edges are removed and polished. Body can also be painted or plated depending upon the requirement. (b) Cylinder: Cylinder is also pressure die casted part from Aluminium or Zinc Alloy. It is the housing for lever tumbler mechanism. It is fitted inside the body of lock during assembly. (c) Lever and Lever Mechanism: Levers are mostly press cut from brass or mild steel sheets. These levers along with springs are fitted inside the cylinder which rotates inside the body to keep open or close the lock with the help of key. (d) Shackle: It is that part of the lock which passes through the staple loop on the door and is engaged to lock bolt when pushed inside the lock and key is turned lock. Shackle are made from mild steel rods, cut to size, notched and bent to the shape. These are generally nickel plated. (e) Key: The key is an important member of lock and key arrangement. It is made of brass or mild steel. It is flat, has long bit or blade with V groves made on one or both edges according to the lever mechanism. All these components are manufactured in various sizes and shapes of the lock. Manufactured components are then assembled and movement of lever cylinder, shackle fixed in position with the help of a pin. The tumbler locks are painted or nickel plated before packing for despatch.

3 104 TUMBLER LOCKS Quality Control and Standards Tumbler locks are to be manufactured as per IS 4230 :1967. Since the locks are directly related to the safety of house hold the manufacturer must ensure the following in addition to IS specification: (a) All the components must be in accordance with the dimensional accuracy. Manufacturing defects in no case be allowed. The raw material must conform to the specifications. (b) Strength of cylinder and shackle must be ensured and it should not lead to failure/break on jerks. (c) The components, particularly levers and keys should be noninterchangeable. (d) Smooth function of the lock must be ensured. Production Capacity (per annum) Item Qty. Total Tumbler Lock Size 48,000 Nos. 12,00, and 25 mm Tumbler Lock Size 60,000 Nos. 22,50, and 35 mm Tumbler Lock Size 12,000 Nos. 6,60, mm Total 1,20,000 Nos. 41,10,000 Motive Power 10 KW. Pollution Control No special arrangements are suggested for pollution control. However, proper disposal of electroplating waste must be ensured. Energy Conservation No special energy conservation measures are to be taken. However, energy efficient machines have been suggested. FINANCIAL ASPECTS A. Fixed Capital (i) Land and Building Covered Area 300 Rs. 5,000 p.m. 5,000 (ii) Machinery and Equipment Sl. Description Ind./ Qty. Toal No. Imp. Production Unit 1. Hand operated Ind. 5 4,25,000 Hot chamber Pneumatic pressure die casting Machine upto 400 gm.capacity with double Toggle Adjustable all steel made ejector and high speed diesel burner and electricals etc. 2. Power Press 10MT Ind. 2 1,30,000 capacity with 1HP motor and electricals 3. Air compressors Ind. 5 75, to 200 lbs Sq. inch capacity with 1 HP motor suitable for Pressure die casting machine above at S.No. (1). 4. Bench Drilling Ind. 2 25,000 machine 10 mm drill dia capacity with 1/2 HP motor and electricals. 5. Bench Grinder Ind. 1 5, mm dia wheel and 3/4 HP motor 6. Lathe 1500 mm Ind. 1 75,000 bed with 2 HP motor and electricals floor model 7. Electroplating Ind. L.s. 1,00,000 plant/painting equipments Total 8,35,500 Erection and Commissioning 10% of the cost of the machinery

4 TUMBLER LOCKS 105 Cost of Dies, Tools and 1,00,000 Measuring instruments Cost of Office equipment 50,000 and furniture Total 10,6950 (iii) Pre-operative Expenses 50,000 Total Fixed Capital (i+ii+iii) 11,19,050 Say 11,20,000 B. Working Capital (per month) (i) Personnel Sl. Particulars Nos. Salary Amount No. (Rs.) 1. Foreman , Skilled workers , Semi-skilled workers , Clerk-cum-Typist , Watchman/Peon ,000 Total 37,000 Add: 15% 5,500 Total 42,500 (ii) Raw Material Sl. ParticularsInd./ Qty. Rate Amount No. Imp. (Rs.) 1. Mazak Alloy Ind. 1.50MT ,05,000 per MT 2. Springs Ind. 100Kg 25/ Kg. 2, MS Sheet Ind /Kg. 10, SWG Kg 4. Misc. items Ind. LS - 75,000 such as electroplating salt, paint, oil, diesel etc. Total 1,92,500 (iii) Utilities Power 2000 kwh Rs. 4/unit 8,000 Water 500 Total 8,500 (iv) Other Contingent Expenses (1) Rent 5,000 (2) Postage and Stationery 1,000 (3) Transportation 3,000 (iv) Other Contingent Expenses (4) Telephone 1,000 (5) Maintenance and Repair 500 (6) Packing 2,500 (7) Insurance 500 (8) Misc. Expenses 1,500 Total 15,000 (v) Total Recurring Expenditure (per month) (i + ii + iii + iv) Rs. 2,58,500 (vi) Working Capital for 1½ months 2,58,500 x 1½ = Rs. 3,87,750 Say Rs. 3,88,000 C. Total Capital Investment (i) Fixed Capital Rs. 11,20,000 (ii) Working Capital for 1½ months Rs. 3,88,000 Total Rs. 15,08,000 FINANCIAL ANALYSIS (1) Cost of Production (per annum) Total recurring cost 31,04,000 Depreciation on 10% 83,550 Depreciation on Dies and 25,000 Depreciation on 20% 10,000 Interest on Capital Investment 16% Total 34,62,550 Say 34,62,000 (2) Turnover (per year) Item Qty. Rate Total Nos. (Rs.) Tumbler Lock Size 48, , and 25 mm Tumbler Lock Size 60, ,50, and 35 mm Tumbler Lock 12, ,60,000 Size 40 mm Total 41,10,000 (3) Profit (per year) Rs. 41,10,000 34,62,000 = Rs. 6,48,000

5 106 TUMBLER LOCKS (4) Percentage Profit on Sales (Net Profit Ratio) = Net Profit (per year) 100 Turnover = = 18.72% (5) Rate of Return = Net Profit 100 Capital Investment = = 43.0% (6) Break-even Point (i) Fixed Cost Total Depreciation 1,18, Interest on investment 2,40, Insurance 6, Rent 60, % of Salary and Wages 2,04, % of Other Contingent Expenses 86, (excluding Rent and Insurance) Total 7,14, (ii) Profit Rs. 6,48, B.E.P. = Fixed Capital 100 Fixed Capital + Profit = 7,14, = 52.5% Addresses of Raw Material Suppliers 1. M/s. Basant Industries Corpn. Industrial Area B, 2. M/s. Hind Engg. Works, Opp. D.S. College, 3. M/s. Singhal Engg. Works Subhash Road, 4. M/s. Daulat Industries Corporation Civil Lines, 5. M/s. Bhag Sons, Indl. Area B, 6. M/s. Kalsi Machinery Mfg. Pvt. Ltd. G. T. Road, 7. M/s. P. K. Engg. Works Opp. D.S. College, 8. M/s. Prakash Engg. Works Agra Road, 9. M/s. James Engg. Works 31, Thembur Chetty Street, Chennai 10. M/s. Atlas Engg. Works G.T. Road, Batala 11. M/s. Perfect Machine Tools Co. 123-Mount Road, Chennai 12. M/s. Hindustan Metal and Engg.Co. B 10, End. Carpenter Street, Mumbai 13. M/s. Komal Industries Corporation 51-Biggan Street, Mumbai 14. M/s. Non-Ferrous Metal Corpn. 174, Sardar Vallabh Bhai Patel Road, Mumbai 15. M/s. Bombay Metal Syndicate, 106-Kila Street, Mumbai M/s. Essential Machine Tools Pvt. Ltd. 5-Nyaymurthi, G.N. Vaidya Marg, Bank Street, P.O. Box No. 2, Behind State Bank, Fort, Mumbai